Cant get Tempo Timesheets to start on Sunday

In our Tempo instance, I have weekend type set to Sat-Sun, and I have the week period starting on Sunday.

When filling out the timesheet, it properly shows Sunday through Saturday, but scheduled closes and all notifications that go out around timesheets reference date ranges that are monday through sunday.

What am I missing to make the closures and notifications recoginize the Sunday through Saturday setup our company uses?